The Dow Jones Industrial Average / ˌ d aʊ ˈ dʒ oʊ n z / (DJIA), or simply the Dow, is a stock market index that shows how 30 large publicly owned companies based in the United States have traded during a standard trading session in the stock market.

The best known U.S. index of stocks. A price-weighted average of 30 actively traded blue-chip stocks, primarily industrials including stocks that trade on the New York Stock Exchange. The Dow, as it is called, is a barometer of how shares of the largest US companies are performing.